Heel cap



FIG. 1 is a right side elevational view of a (heel cap) showing our new design; the left side being a mirror image thereto;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top and right front perspective view thereof.

The broken-line showings of a shoe in FIG. 4 are environmental only and form no portion of the claimed design. 

The ornamental design for a heel cap, as shown. 